Write a script that takes the name of a directory as an argument and searches the file hierarchy rooted at that directory for zero-length files. Write the names of all zero-length files to standard output. If there is no option on the command line, have the script delete the file after displaying its name, asking the user for confir- mation, and receiving positive confirmation. A -f (force) option on the command line indicates that the script should display the filename but not ask for confirma- tion before deleting the file.